Surgical suture. Surgical suture is a medical device used to hold body tissues together after an injury or surgery. Application generally involves using a needle with an attached length of thread. A number of different shapes, sizes, and thread materials have been developed over its millennia of history.
Parentheses or round brackets, denoted by '( )', is generally used to define the different precedence of numbers in a mathematical expression. Box brackets or square brackets: Apart from mathematical expression, '[ ]' square brackets are also used to represent the numbers in interval.
The adverb sic, usually enclosed in brackets, is a word editors use in the reproduction of someone else's speech or writing to indicate that an unexpected form exactly reproduces the original and is not a copier's mistake. Sic comes from Latin, in which it means so or thus.. Though it's a useful tool, some usage commentators feel it is bad manners to use a sic to needlessly call attention to someone's error or to deride the language of a less-educated person.